wkx

0.5.0last stable release 5 years ago
Complexity Score
Low
Open Issues
30
Dependent Projects
81
Weekly Downloadsglobal
1,863,841

License

  • MIT
    • Yesattribution
    • Permissivelinking
    • Permissivedistribution
    • Permissivemodification
    • Nopatent grant
    • Yesprivate use
    • Permissivesublicensing
    • Notrademark grant

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wkx

A WKT/WKB/EWKT/EWKB/TWKB/GeoJSON parser and serializer with support for

  • Point
  • LineString
  • Polygon
  • MultiPoint
  • MultiLineString
  • MultiPolygon
  • GeometryCollection

Examples

The following examples show you how to work with wkx.

var wkx = require('wkx');

//Parsing a WKT string
var geometry = wkx.Geometry.parse('POINT(1 2)');

//Parsing an EWKT string
var geometry = wkx.Geometry.parse('SRID=4326;POINT(1 2)');

//Parsing a node Buffer containing a WKB object
var geometry = wkx.Geometry.parse(wkbBuffer);

//Parsing a node Buffer containing an EWKB object
var geometry = wkx.Geometry.parse(ewkbBuffer);

//Parsing a node Buffer containing a TWKB object
var geometry = wkx.Geometry.parseTwkb(twkbBuffer);

//Parsing a GeoJSON object
var geometry = wkx.Geometry.parseGeoJSON({ type: 'Point', coordinates: [1, 2] });

//Serializing a Point geometry to WKT
var wktString = new wkx.Point(1, 2).toWkt();

//Serializing a Point geometry to WKB
var wkbBuffer = new wkx.Point(1, 2).toWkb();

//Serializing a Point geometry to EWKT
var ewktString = new wkx.Point(1, 2, undefined, undefined, 4326).toEwkt();

//Serializing a Point geometry to EWKB
var ewkbBuffer = new wkx.Point(1, 2, undefined, undefined, 4326).toEwkb();

//Serializing a Point geometry to TWKB
var twkbBuffer = new wkx.Point(1, 2).toTwkb();

//Serializing a Point geometry to GeoJSON
var geoJSONObject = new wkx.Point(1, 2).toGeoJSON();

Browser

To use wkx in a webpage, simply copy a built browser version from dist/ into your project, and use a script tag to include it:

<script src="wkx.js"></script>

If you use browserify for your project, you can simply npm install wkx --save, and just require wkx as usual in your code.

Regardless of which of the preceeding options you choose, using wkx in the browser will look the same:

var wkx = require('wkx');

var geometry = wkx.Geometry.parse('POINT(1 2)');

console.log(geometry.toGeoJSON());

In addition to the wkx module, the browser versions also export buffer, which is useful for parsing WKB:

var Buffer = require('buffer').Buffer;
var wkx = require('wkx');

var wkbBuffer = new Buffer('0101000000000000000000f03f0000000000000040', 'hex');
var geometry = wkx.Geometry.parse(wkbBuffer);

console.log(geometry.toGeoJSON());

Dependencies

CVE IssuesActive
0
Scorecards Score
1.70
Test Coverage
100.00%
Follows Semver
Yes
Github Stars
312
Dependenciestotal
12
DependenciesOutdated
5
DependenciesDeprecated
0
Threat Modelling
No
Repo Audits
No

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